Q1. Silver containing lead as an impurity is removed by –
(a) Poling
(b) Cupellation
(c) Lavigation
(d) Distillation
Q2. The process of sudden cooling is known as –
(a) annealing
(b) diffusion
(c) quenching
(d) sedimentation
Q3. The metal which is generally used for the filaments of electric bulb is-
(a) Pt
(b) Fe
(c) W
(d) Cu
Q4. 1 amu is equal to-
(a) 1.00758 g
(b) 0.000549 g
(c) 1.66 × 10^23
(d) None of the above
Q5. Antimony is-
(a) metal
(b) non metal
(c) metalloid
(d) none of these
Q6. Which one of the following is not a mixture compound –
(a) air
(b) milk
(c) mercury
(d) cement
Q7.Who presented the theory of radioactive disintegration?
(a) Rutherford and Soddy
(b) Soddy and Fajan
(c) Thomson and Rutherford
(d) Hahn and strassman
Q8.Group displacement law was given by–
(a) Bacquerel
(b) Rutherford
(c) Mendeleaf
(d) Soddy and Fajan
Q9. Which one of the following decreases the extent of evaporation of water?
(a) High wind speed
(b) High temperature
(c) Large surface area
(d) Large humidity
Q10. The temperature above which a gas cannot be liquefied is known as—
(a) Critical temperature
(b) Boiling temperature
(c) Melting temperature
(d) critical pressure
Solutions:
S1. Ans.(b)
S2. Ans.(c)
S3. Ans.(c)
S4. Ans.(c)
S5. Ans.(c)
S6. Ans.(c)
S7.Ans.(a)
S8.Ans.(d)
S9.Ans.(d)
S10.Ans.(a)
